Re: Two more concrete ideas for what a once-yearly+update schedule
would look like

Right. I understand that but the solution of letting things stay in
updates-testing for a long time isn't a great way to implement that. It an
abuse of updates-testing.
No one is doing that. You have to read the whole thread.

What makes you assume I didn't? I am quoting you again
" KDE folks by and large want the updates as fast as possible. If the
GNOME folks would like
their updates to age for six months, they can just keep them in
updates-testing."